o-Phthalic anhydride - Premium-Grade Reagents, ≥99% , CAS No.85-44-9

CAS: 85-44-9 Cat. No.: P116466 Molecular Weight: 148.12 Beilstein Registry Number: 118515 EC Number: 201-607-5
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GRADE & PURITY Premium-Grade Reagents ? Premium-grade reagents with enhanced purity and tighter QC than standard grades. Use for demanding applications needing extra consistency. ≥99%
Synonyms
CHEBI:36605 | PHTHALIC ANHYDRIDE | Wiltrol P | 1,3-DIOXOPHTHALANE | Anidride ftalica | pthalic anhydride | RCRA waste number U190 | STL194302 | HSDB 4012 | Phthalic anhydride treated gelatin | Phthalic anhydride, ACS reagent, >=99% | 2-Benzofuran-1,3-dion
Storage
Room temperature,Argon charged
Shipped In
FedEx DG Service
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Size
Status
Price
Qty
100g
P116466-100g
8-12 wks(?) Production requires sourcing of materials. We appreciate your patience and understanding.
$12.90
500g
P116466-500g
2
$24.90
12×500g
P116466-12×500g
8-12 wks(?) Production requires sourcing of materials. We appreciate your patience and understanding.
$238.90
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Why this grade

Premium-Grade Reagents, ≥99% Premium-Grade Reagents for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

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Storage & shipping

Room temperature,Argon charged Ships FedEx DG Service Check lot-specific COA for exact specifications.

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Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

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Literature proof

Cited in 13 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Overview

Product Describtion:

Phthalic anhydride is an industrially important chemical. It can be prepared from o-xylene or naphthalene. It is widely used for the industrial preparation of plasticizers for PVC (polyvinyl chloride).Phthalic anhydride can be synthesized via oxidation of o-xylene, in the presence of V2O5/TiO2 monolithic catalyst supported by aluminium honeycomb.

Specifications

Synonyms
CHEBI:36605 | PHTHALIC ANHYDRIDE | Wiltrol P | 1, 3-DIOXOPHTHALANE | Anidride ftalica | pthalic anhydride | RCRA waste number U190 | STL194302 | HSDB 4012 | Phthalic anhydride treated gelatin | Phthalic anhydride, ACS reagent, >=99% | 2-Benzofuran-1, 3-dion
Specifications & Purity
Premium-Grade Reagents, ≥99%
Storage
Room temperature, Argon charged
Shipped In
FedEx DG Service
This product requires cold chain shipping. Ground and other economy services are not available.
Grade
Premium-Grade Reagents
Purity
≥99%
Names and Identifiers
Pubchem Sid488180164
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/488180164
Canonical SmilesC1=CC=C2C(=C1)C(=O)OC2=O
IUPAC Name2-benzofuran-1,3-dione
InChIKeyLGRFSURHDFAFJT-UHFFFAOYSA-N
INCHI1S/C8H4O3/c9-7-5-3-1-2-4-6(5)8(10)11-7/h1-4H
Isomeric SMILES C1=CC=C2C(=C1)C(=O)OC2=O
WGK Germany 1
RTECS TI3150000
UN Number 2214
Packing Group III
Molecular Weight 148.12
Beilstein 118515
Reaxy-Rn 118515
Reaxys-RN_link_address https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=118515&ln=

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

Download SDS →

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

Look up COA →

📊 Datasheet

Quick-reference summary of product specifications and applications.

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🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassOrganoheterocyclic compounds
ClassBenzofurans
SubclassBenzofuranones
Intermediate Tree Nodes Not available
Direct ParentPhthalic anhydrides
Alternative Parents Isobenzofuranones  Dicarboxylic acids and derivatives  Benzenoids  Carboxylic acid anhydrides  Oxacyclic compounds  Organooxygen compounds  Organic oxides  Hydrocarbon derivatives  
Molecular FrameworkAromatic heteropolycyclic compounds
Substituents Phthalic anhydride - Phthalic_anhydride - Isobenzofuranone - Isocoumaran - Benzenoid - Dicarboxylic acid or derivatives - Carboxylic acid anhydride - Oxacycle - Carboxylic acid derivative - Organic oxygen compound - Organic oxide - Hydrocarbon derivative - Organooxygen compound - Aromatic heteropolycyclic compound
DescriptionThis compound belongs to the class of organic compounds known as phthalic anhydrides. These are compounds containing a phthalic anhydride moiety (or a derivative thereof), which consists of a benzene fused to a furan-1,3-dione.
External Descriptors 2-benzofurans - cyclic dicarboxylic anhydride
3D Structure
Interactive Chemical Structure Model





Associated Targets(Human)
AR Tclin Androgen Receptor (11781 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
PPARG Tclin Peroxisome proliferator-activated receptor gamma (15191 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
CXCL8 Tchem Interleukin-8 (642 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
ALOX15 Tchem Arachidonate 15-lipoxygenase (7108 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
COLO 205 (50209 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
COLO 320 (353 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
MRC5 (9203 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
Lymphoblastoid cell (5959 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
TDP1 Tchem Tyrosyl-DNA phosphodiesterase 1 (345557 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
Associated Targets(non-human)
Abcb1b P-glycoprotein 1 (174 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
Botrytis cinerea (4183 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
Rorc Nuclear receptor ROR-gamma (89407 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
Mechanisms of Action
Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

50 results found

Lot NumberCertificate TypeDateItem
F2602455Certificate of AnalysisMay 20, 2026 P116466
F2602454Certificate of AnalysisMay 20, 2026 P116466
F2602459Certificate of AnalysisMay 20, 2026 P116466
F2602450Certificate of AnalysisMay 20, 2026 P116466
C2619392Certificate of AnalysisJan 13, 2026 P116466
C2602096Certificate of AnalysisJan 13, 2026 P116466
A2613537Certificate of AnalysisJan 05, 2026 P116466
A2613538Certificate of AnalysisJan 05, 2026 P116466
A2613540Certificate of AnalysisJan 05, 2026 P116466
A2613541Certificate of AnalysisJan 05, 2026 P116466
G2515466Certificate of AnalysisJul 04, 2025 P116466
G2515465Certificate of AnalysisJul 04, 2025 P116466
G2515467Certificate of AnalysisJul 04, 2025 P116466
G2515468Certificate of AnalysisJul 04, 2025 P116466
B2508374Certificate of AnalysisJan 17, 2025 P116466
B2508357Certificate of AnalysisJan 17, 2025 P116466
B2508352Certificate of AnalysisJan 17, 2025 P116466
A2510376Certificate of AnalysisDec 30, 2024 P116466
A2111081Certificate of AnalysisNov 13, 2024 P116466
J2415553Certificate of AnalysisSep 20, 2024 P116466
J2415593Certificate of AnalysisSep 20, 2024 P116466
J2415596Certificate of AnalysisSep 20, 2024 P116466
H2402418Certificate of AnalysisJul 12, 2024 P116466
H2402420Certificate of AnalysisJul 12, 2024 P116466
H2402421Certificate of AnalysisJul 12, 2024 P116466
H2402423Certificate of AnalysisJul 12, 2024 P116466
D2411345Certificate of AnalysisMar 22, 2024 P116466
D2411343Certificate of AnalysisMar 22, 2024 P116466
D2411341Certificate of AnalysisMar 22, 2024 P116466
L2325057Certificate of AnalysisFeb 22, 2023 P116466
C2303953Certificate of AnalysisFeb 22, 2023 P116466
C23031221Certificate of AnalysisFeb 22, 2023 P116466
C23031219Certificate of AnalysisFeb 22, 2023 P116466
C23031213Certificate of AnalysisFeb 22, 2023 P116466
J2210683Certificate of AnalysisSep 13, 2022 P116466
J2210684Certificate of AnalysisSep 13, 2022 P116466
J2210682Certificate of AnalysisSep 13, 2022 P116466
K2317034Certificate of AnalysisSep 13, 2022 P116466
F2201136Certificate of AnalysisMar 15, 2022 P116466
I2206044Certificate of AnalysisMar 15, 2022 P116466
I2208476Certificate of AnalysisMar 15, 2022 P116466
F2201138Certificate of AnalysisMar 15, 2022 P116466
H2328065Certificate of AnalysisMar 15, 2022 P116466
F2201140Certificate of AnalysisMar 15, 2022 P116466
F2201135Certificate of AnalysisMar 15, 2022 P116466
B2314203Certificate of AnalysisMar 15, 2022 P116466
A2220456Certificate of AnalysisJan 07, 2022 P116466
A2220389Certificate of AnalysisJan 07, 2022 P116466
A2220302Certificate of AnalysisJan 07, 2022 P116466
A2220300Certificate of AnalysisJan 07, 2022 P116466

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Chemical and Physical Properties
SolubilitySoluble in water, carbon disulfide, ethanol, acetone and benzene. Slightly soluble in ethyl ether
SensitivityMoisture sensitive.
Flash Point(°F)305.6 °F
Flash Point(°C)152 °C
Boil Point(°C)295°C
Melt Point(°C)130.8°C
Molecular Weight148.110 g/mol
XLogP31.300
Hydrogen Bond Donor Count0
Hydrogen Bond Acceptor Count3
Rotatable Bond Count0
Exact Mass148.016 Da
Monoisotopic Mass148.016 Da
Topological Polar Surface Area43.400 Ų
Heavy Atom Count11
Formal Charge0
Complexity187.000
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
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Citations of This Product
References
1. Feng Yang, Junru Yao, Liqiang Jin, Wenjun Huyan, Jintang Zhou, Zhengjun Yao, Peijiang Liu, Xuewei Tao.  (2022)  Multifunctional Ti3C2TX MXene/Aramid nanofiber/Polyimide aerogels with efficient thermal insulation and tunable electromagnetic wave absorption performance under thermal environment.  COMPOSITES PART B-ENGINEERING,      [PMID:] [10.1016/j.compositesb.2022.110161]
2. Xin Gao, Baodong Li, Shouwei Jian.  (2022)  Step-scheme CeO2/CaIn2S4 heterostructured photocatalysts for efficient reduction of Cr(Ⅵ) under visible light.  COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,      [PMID:] [10.1016/j.colsurfa.2022.129168]
3. Jianping Guan, Jiao Yang, Yue Zhang, Xiaoxue Zhang, Huajuan Deng, Juan Xu, Jinyi Wang, Mao-Sen Yuan.  (2020)  Employing a fluorescent and colorimetric picolyl-functionalized rhodamine for the detection of glyphosate pesticide.  TALANTA,      [PMID:33379052] [10.1016/j.talanta.2020.121834]
4. Qiang Liu, Lei Gao, Xingsong Su, Fei Zhou, Guotao Duan.  (2019)  Interfacial self-assembly of CoPc thin films with their high sensing use as NO2 sensors.  MATERIALS CHEMISTRY AND PHYSICS,      [PMID:] [10.1016/j.matchemphys.2019.05.029]
5. Xing Ruimin, Yang Haitang, Li Shengnan, Yang Jinghe, Zhao Xiaoyu, Wang Qinglong, Liu Shanhu, Liu Xiuhua.  (2016)  A sensitive and reliable rutin electrochemical sensor based on palladium phthalocyanine-MWCNTs-Nafion nanocomposite.  JOURNAL OF SOLID STATE ELECTROCHEMISTRY,  21  (5): (1219-1228).  [PMID:] [10.1007/s10008-016-3447-5]
6. Zhaoyu Cao, Minming Wu, Yunfei Zhao, Lisha Dai, Rong Zeng, Mei Tu, Jianhao Zhao.  (2016)  Bioinspired double-positively charged phosphodicholine-chitosan and zwitterionic phosphorylcholine-chitosan conjugates: The associated water structure, biocompatibility and antibacterial action.  REACTIVE & FUNCTIONAL POLYMERS,      [PMID:] [10.1016/j.reactfunctpolym.2016.03.018]
7. Qinglong Wang, Haiyan Li, Jing-He Yang, Qian Sun, Qiuye Li, Jianjun Yang.  (2016)  Iron phthalocyanine-graphene donor-acceptor hybrids for visible-light-assisted degradation of phenol in the presence of H2O2.  APPLIED CATALYSIS B-ENVIRONMENTAL,      [PMID:] [10.1016/j.apcatb.2016.03.047]
8. Haodong Gu, Li Tian, Qiuqi Zhang, Xiao You, Mengmeng Wang, Shaoming Dong, Jinshan Yang.  (2024)  Biomimetic Leaf-Vein Aerogel for Electromagnetic Wave Absorption and Thermal Superinsulation.  Small,      [PMID:38845523] [10.1002/smll.202402423]
9. Zhaoying Yang, Xinge Wu, Gaowu Qin, Xiangying Meng.  (2025)  FeCo-SN-C dual-site catalyst with high stability and oxygen reduction activity.  INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,      [PMID:] [10.1016/j.ijhydene.2025.03.204]
10. Yanhao Liu, Shubin Li, Jiang Zhu, Lili Fan, Lu Wang.  (2024)  Rapid preparation of injectable dual-network hydrogels for biomedical applications using UV-triggered sulfhydryl click reactions.  COLLOIDS AND SURFACES B-BIOINTERFACES,      [PMID:39217728] [10.1016/j.colsurfb.2024.114180]
11. Danyan Lin, Xiujie Lin, Hao Li, Hongyuan Huang, Huan Yang, Jie Yang, Baowei Hu, Fengfeng Chen, Xinrong Guo, Xiangke Wang, Wen Yao.  (2025)  Ultrathin porous nitrogen-doped carbon nanosheets with rich defects for efficient Cr(VI) reduction.  APPLIED CATALYSIS B-ENVIRONMENTAL,      [PMID:] [10.1016/j.apcatb.2025.125174]
12. Runhong Zhu, Yunlong Shi, Yi Zhou, Yi Xia, Qin Qi, Xiaojie Liang, Meijuan Kuang, Zhenya Jia, Mengyue Wang, Changjiang Yu.  (2025)  Highly reactive iron/nickel bimetallic biochar composites for highly efficient remediation of Cr(VI).  NEW JOURNAL OF CHEMISTRY,      [PMID:] [10.1039/D5NJ00107B]
13. Tao Zhang, Yusong Xu, Jingya Dai, Xianming Zhang.  (2025)  Epoxidized soybean oil-based waterborne polyurethane coated polyethylene terephthalate fabrics with high flame-retardant, self-healing and wash-resistant properties.  PROGRESS IN ORGANIC COATINGS,      [PMID:] [10.1016/j.porgcoat.2025.109315]
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